CVE-2001-1154

Cyrus 2.0.15, 2.0.16, and 1.6.24 on BSDi 4.2, with IMAP enabled, allows remote attackers to cause a denial of service (hang) using PHP IMAP clients.

Published: 2001-08-30 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2001-1154 is rated Moderate Risk (46.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.61%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2001-1154

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.74% 1.61% +0.88%
2 2025-03-30 0.76% 0.74% -0.03%
3 2025-03-29 — 0.76% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2001-1154

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2001-1154

Affected software / configurations for CVE-2001-1154

Vendor Product Version Raw CPE
carnegie_mellon_university cyrus_imap_server 1.6.24 cpe:2.3:a:carnegie_mellon_university:cyrus_imap_server:1.6.24:*:*:*:*:*:*:*
carnegie_mellon_university cyrus_imap_server 2.0.15 cpe:2.3:a:carnegie_mellon_university:cyrus_imap_server:2.0.15:*:*:*:*:*:*:*
carnegie_mellon_university cyrus_imap_server 2.0.16 cpe:2.3:a:carnegie_mellon_university:cyrus_imap_server:2.0.16:*:*:*:*:*:*:*
bsdi bsd_os 4.2 cpe:2.3:o:bsdi:bsd_os:4.2:*:*:*:*:*:*:*

References for CVE-2001-1154

cvelogic Threat Intelligence